Door-alarm



(No Model.)

. 0. B. DE LAMARRE.

DOOR ALARM..

No. 577,433. Patented Feb. Z3, 1897.

FIG

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CHARLES E. DE LAMARRE, OF BILOXI, MISSISSIPPI, ASSIGNOR OF ONE-HALF TO OTTO MANDRUP TENNISON, OF NEW ORLEANS, LOUISIANA.

DOOR-ALARM.

SPECIFICATION forming part of Letters Patent No. 577,433, dated February 23, 1897.

I Application filed August 26, 1896. Serial No. 604,023. (No model.)

To all whom, it may concern.

Be it known that I, CHARLES 13. DE LA- MARRE, a citizen of the United States, residing at BiloXi, in the county of Harrison and State of Mississippi, have invented certain new and useful Improvements in Signals or Alarms; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to certain new and useful improvements in signals or alarms designed for the purpose of signaling inside of abuilding to notify the occupant or occupants of the presence of a person at the outside door seeking admission.

It has for its objects, among others, to produce and provide a simple and cheap construction for accomplishing this end that shall dispense with thestringing of wires for ordinary bells, that so often break, and to discard the expensive and objectionable batteries required for electric bells.

' I provide a simple and cheap device for sounding the alarm, which can be readily applied and which shall be most efficient in use, as well as durable and not liable to get out of order. It comprises a bellows mounted on the inner face of the door-frame and designed to be actuated by a pull extending to the outside and which, when operated, will sound the alarm, which may be located at any desired point within the house. This alarm is in the nature of a whistle, which may be so constructed as to emit shrill or melodious tones or sounds.

Other objects and advantages of the invention will hereinafter appear, and the novel features thereof will be specifically defined by the appended claims.

The invention in this instance resides in the peculiar combinations and the construc tion, arrangement, and adaptation of parts, all as more fully herein after described, shown in the drawings, and then particularly pointed out in the claims.

The invention is clearly illustrated in the accompanying drawings, which, with the letters of reference marked thereon, form a part of this specification, and in which-=- Figure l is a perspective view showing the application of the invention. Fig. 2 is a section through the same. Fig. 3 is an elevation of a modified form. Fig. 4 is a detail of the eXhalating and inhalating whistles.

Like letters of reference indicate like parts throughout the several views.

The views herein given are sufficient to illustratethe principle of the invention. The same is capable of embodiment in various forms, two only of which only are herein disclosed, but it is to be understood that the invention is not be restricted to the details of construction of such illustrated forms.

Referring then to the details of the drawings by letter, A designates the frame of a door, to which the bellows may be attached by any suitable means. In this instance I have shown the lugs 19, through which pass the screws or other means a, for this purpose. The air-reservoir or air-bellows may be of any desired size and has two air-chambers O and D, formed by the central wall or partition E, which is pivoted, as shown, and arranged between the sides, which are held in1 movably by the rods or other suitable means F, as shown. This partition is designed to be moved within the reservoir by the arm G, to which is connected the chain or cord H, the other end of which is connected with the knob I by rod J, the said knob being located upon the outside of the door-frame, similar to the ordinary bell-pull. The chain permits of the necessary movements of the rod and the partition with ease and without friction against the walls of the opening through which the rod passes.

K is a spring arranged within the reservoir and secured at one end to the inner face of the side adjacent to the door-frame and bearing against the partition, as shown.

L is a whistle which may be located at any desired distance from the door, in any room, and having connected therewith a pipe M, which may be secured to the wall in any suit able manner and communicating with the pipe m, which connects with the inverted-U shaped connection N, one leg or tube of which enters the reservoir upon one side of the partition and the other entering the-reservoir upon the other side of said partition.

The operation will be apparent. lVhen the knob is pulled outward, the partition is moved on its pivot toward the outer wall of the reservoir, thus compressing the air within the chamber 0 and forcing it out the pipes n and connection N and pipe M into the whistle with force enough to give the most piercing or most melodious sounds, according to the nature of the whistle. Vhen the strain on the knob has been lessened or released, the spring will force outward the pivoted partition against the outer immovable wall of the reservoir and thus compress the air within the chamber D, which will escape through the tube a, connection N, and pipe M into the whistle. It will thus be seen that the partition will produce in retrograding the double action that will prolong the whistle, at the same time driving the knob to its proper place for the next alarm. At the bottom of the tubes n n are two valves N, the one opening when the air is ejected from the air-chamber C and the other closing, and vice versa, inorder to prevent the air from one chamber going into the other when forced to the whistle. Each of these chambers has an aspirating air-valve O at the bottom thereof to allow of the inflation of the chambers after the air has been expelled therefrom.

In Fig. 3 I have shown a modified form of the invention, in which the same principle is involved, but the bellows is not a double one, as is that shown in Fig. 1. It has the outer side, that is, the one farthest from the doorframe, movable, being actuated by the knob and connect-ions in the one direction and by the spring arranged within the reservoir and bearing against the outer movable wall in the opposite direction. There is of course but one outlet-tube from the chamber to the whistle, but the whistle may be constructed as seen in Fig. 4:, where it will be seen that the pipe M has at its outer end the substantially U-shaped tube P, connected therewith, and in each tube is a whistle, and each has a valve Q and B, respectively. hen the knob is pulled upon, the air in the chamber is compressed and the compressed air is exhalated through the pipe M and valve Q into the whistle S, the valve Q opening and the valve R being closed. As the movable side of the reservoir is returned to its normal position the valve Q closes and the valve R is opened by the inhalation of the air through the whistle T. Thus the alarm is continued or prolonged.

Various other modifications in detail may be resorted to without departing from the spirit of the invention or sacrificing any of its advantages. The reservoir may be of other shapes than that shown, and it may be operated in a different manner, and still the principle of the invention would be adhered to, and thus be within the scope of my invention.

\Vhat is claimed as new is- 1. The combination with a bellows, having a pivoted movable interior partition, of a whistle, a connection between the same, and means connected with the partition for actuating the bellows to force the air through the whistle, as set forth.

2. The combination with the fixed and movable sides of the bellows, having a pivoted movable interior partition, of means for moving the movable portion in one direction, a spring for moving it in the opposite direction, and a whistle adapted to be sounded by the compression of the air caused by the moving part, as set forth.

The combination with the bellows having a pivoted movable interior partition and its actuating means, of a whistle connected therewith and adapted to operate both by exhalation and inhalation, as set forth.

4:. The combination with the bellows having a movable part, forming an interior partition and extended to form an operatingarm and means for actuating the same, of a whistle, and a pipe connecting the same with the bellows to sound the whistle, as set forth.

5. The combination with the double bellows having an interior pivoted partition extended to form an operating-awn, of the whistle, a pipe connected therewith and a pipe from each chamber of the bellows connected with said pipe, as set forth.

6. The combination with the double bellows having an interior pivoted partition extended to form an operating-arm, of the whistle, a pipe connected therewith, a pipe from each chamber of the bellows connected with said pipe, and a valve in each of the pipes leading from the bellows, substantially as and for the purpose specified.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

CHARLES B. DE LAMARRE.

lVitnesses:

L. RAYMOND, PERENEs, A. 

